Odpowiedź :
Odpowiedź:
2(x + 1) = 5
2x + 2 = 5
2x = 5 - 2
2x = 3
x = 1,5
3(x - 2) - 7 = 8
3x - 6 - 7 = 8
3x = 8 + 6 + 7
3x = 21
x = 7
2x - (3x + 1) = 6
2x - 3x - 1 = 6
-x = 6 + 1
-x = 7
x = -7
2 - (5 + x) = 2(3 - x)
2 - 5 - x = 6 - 2x
-x + 2x = 6 - 2 + 5
x = 9
5(x + 1) - 2(2x + 3) + 4x = -x
5x + 5 - 4x - 6 + 4x = -x
5x - 4x + 4x + x = -5 + 6
6x = 1
x = [tex]\frac{1}{6}[/tex]
a) 2(x+1) = 5
2x+2 = 5 |-2
2x= 3. | :2
x= 1,5
b) 3(x-2)-7 = 8
3x-6-7 = 8
3x-13 = 8. |+13
3x = 21. | :3
x = 7
c) 2x-(3x+1) = 6
2x-3x-1 = 6
-x-1 = 6. |+1
-x = 7. | :(-1)
x = -7
d) 2-(5+x) = 2(3-x)
2-5-x = 6-2x
-3-x=6-2x |+x
-3 = 6 - x. |-6
-x = -9. | : (-1)
x = 9
e) 5(x+1)-2(2x+3)+4x=-x
5x+5-4x-6+4x=-x
5x-1=-x. |+1
5x= -x + 1. |+x
6x=1. | :6
x= 1/6
2x+2 = 5 |-2
2x= 3. | :2
x= 1,5
b) 3(x-2)-7 = 8
3x-6-7 = 8
3x-13 = 8. |+13
3x = 21. | :3
x = 7
c) 2x-(3x+1) = 6
2x-3x-1 = 6
-x-1 = 6. |+1
-x = 7. | :(-1)
x = -7
d) 2-(5+x) = 2(3-x)
2-5-x = 6-2x
-3-x=6-2x |+x
-3 = 6 - x. |-6
-x = -9. | : (-1)
x = 9
e) 5(x+1)-2(2x+3)+4x=-x
5x+5-4x-6+4x=-x
5x-1=-x. |+1
5x= -x + 1. |+x
6x=1. | :6
x= 1/6